I agree 100% with Maikychan here. Hyper and turbos can teach a new player very bad habits that wouldn't be very profitable in the long run. However I agree most with they help players learn to play a short stack.1. I sincerely think that a beginner should play more SNGs and Cash Games (microlimit) 'cause there they would benefit a little from each one.
In SNGs they would learn to play with the increase of the blinds and the bubble.
In cash games they played more quietly (no increasing blinds) and were developing post-flop play.
2. They're mostly used as satellites and freerolls, but I particularly like to play a turbo/hyper one time or another 'cause they give you a bigger adrenaline than a regular tournament.
3. Yes, it's totally possible! But in my view what a hyper/turbo tournament can teach you the best is to play short stack.